/**
* --------------------------------------------------------------------
* jQuery-Plugin "pngFix"
* Version: 1.2, 09.03.2009
* by Andreas Eberhard, andreas.eberhard@gmail.com
*                      http://jquery.andreaseberhard.de/
*
* Copyright (c) 2007 Andreas Eberhard
* Licensed under GPL (http://www.opensource.org/licenses/gpl-license.php)
*
* Changelog:
*    09.03.2009 Version 1.2
*    - Update for jQuery 1.3.x, removed @ from selectors
*    11.09.2007 Version 1.1
*    - removed noConflict
*    - added png-support for input type=image
*    - 01.08.2007 CSS background-image support extension added by Scott Jehl, scott@filamentgroup.com, http://www.filamentgroup.com
*    31.05.2007 initial Version 1.0
* --------------------------------------------------------------------
* @example $(function(){$(document).pngFix();});
* @desc Fixes all PNG's in the document on document.ready
*
* jQuery(function(){jQuery(document).pngFix();});
* @desc Fixes all PNG's in the document on document.ready when using noConflict
*
* @example $(function(){$('div.examples').pngFix();});
* @desc Fixes all PNG's within div with class examples
*
* @example $(function(){$('div.examples').pngFix( { blankgif:'ext.gif' } );});
* @desc Fixes all PNG's within div with class examples, provides blank gif for input with png
* --------------------------------------------------------------------
*/

(function ($) {

    jQuery.fn.pngFix = function (settings) {

        // Settings
        settings = jQuery.extend({
            blankgif: 'blank.gif'
        }, settings);

        var ie55 = (navigator.appName == "Microsoft Internet Explorer" && parseInt(navigator.appVersion) == 4 && navigator.appVersion.indexOf("MSIE 5.5") != -1);
        var ie6 = (navigator.appName == "Microsoft Internet Explorer" && parseInt(navigator.appVersion) == 4 && navigator.appVersion.indexOf("MSIE 6.0") != -1);
        if (jQuery.browser != undefined) {
            if (jQuery.browser.msie && (ie55 || ie6)) {

                //fix images with png-source
                jQuery(this).find("img[src$=.png]").each(function () {

                    jQuery(this).attr('width', jQuery(this).width());
                    jQuery(this).attr('height', jQuery(this).height());

                    var prevStyle = '';
                    var strNewHTML = '';
                    var imgId = (jQuery(this).attr('id')) ? 'id="' + jQuery(this).attr('id') + '" ' : '';
                    var imgClass = (jQuery(this).attr('class')) ? 'class="' + jQuery(this).attr('class') + '" ' : '';
                    var imgTitle = (jQuery(this).attr('title')) ? 'title="' + jQuery(this).attr('title') + '" ' : '';
                    var imgAlt = (jQuery(this).attr('alt')) ? 'alt="' + jQuery(this).attr('alt') + '" ' : '';
                    var imgAlign = (jQuery(this).attr('align')) ? 'float:' + jQuery(this).attr('align') + ';' : '';
                    var imgHand = (jQuery(this).parent().attr('href')) ? 'cursor:hand;' : '';
                    if (this.style.border) {
                        prevStyle += 'border:' + this.style.border + ';';
                        this.style.border = '';
                    }
                    if (this.style.padding) {
                        prevStyle += 'padding:' + this.style.padding + ';';
                        this.style.padding = '';
                    }
                    if (this.style.margin) {
                        prevStyle += 'margin:' + this.style.margin + ';';
                        this.style.margin = '';
                    }
                    var imgStyle = (this.style.cssText);

                    strNewHTML += '<span ' + imgId + imgClass + imgTitle + imgAlt;
                    strNewHTML += 'style="position:relative;white-space:pre-line;display:inline-block;background:transparent;' + imgAlign + imgHand;
                    strNewHTML += 'width:' + jQuery(this).width() + 'px;' + 'height:' + jQuery(this).height() + 'px;';
                    strNewHTML += 'filter:progid:DXImageTransform.Microsoft.AlphaImageLoader' + '(src=\'' + jQuery(this).attr('src') + '\', sizingMethod=\'scale\');';
                    strNewHTML += imgStyle + '"></span>';
                    if (prevStyle != '') {
                        strNewHTML = '<span style="position:relative;display:inline-block;' + prevStyle + imgHand + 'width:' + jQuery(this).width() + 'px;' + 'height:' + jQuery(this).height() + 'px;' + '">' + strNewHTML + '</span>';
                    }

                    jQuery(this).hide();
                    jQuery(this).after(strNewHTML);

                });

                // fix css background pngs
                jQuery(this).find("*").each(function () {
                    var bgIMG = jQuery(this).css('background-image');
                    if (bgIMG.indexOf(".png") != -1) {
                        var iebg = bgIMG.split('url("')[1].split('")')[0];
                        jQuery(this).css('background-image', 'none');
                        jQuery(this).get(0).runtimeStyle.filter = "progid:DXImageTransform.Microsoft.AlphaImageLoader(src='" + iebg + "',sizingMethod='scale')";
                    }
                });

                //fix input with png-source
                jQuery(this).find("input[src$=.png]").each(function () {
                    var bgIMG = jQuery(this).attr('src');
                    jQuery(this).get(0).runtimeStyle.filter = 'progid:DXImageTransform.Microsoft.AlphaImageLoader' + '(src=\'' + bgIMG + '\', sizingMethod=\'scale\');';
                    jQuery(this).attr('src', settings.blankgif)
                });

            }
        }
        return jQuery;

    };

})(jQuery);
